OBJECTIVE LIFE SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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revolving nosepiece
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fine adjustment knob
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coarse adjustment knob
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arm/neck
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Detailed explanation-1: -Coarse adjustment knob-Focuses the image under low power (usually the bigger knob) Fine adjustment knob-Sharpens the image under all powers (usually the smaller knob) Arm-supports the body tube and is used to carry the microscope.
Detailed explanation-2: -COARSE ADJUSTMENT KNOB-A rapid control which allows for quick focusing by moving the objective lens or stage up and down. It is used for initial focusing.
Detailed explanation-3: -The coarse adjustment knob should only be used in the scanning objective lens because it moves the stage up and down in bigger increments and brings it closer to the lens faster, bringing it into focus. The fine adjustment knob is used on the higher objectives and brings the image into sharper focus.